40043213543 has 24 divisors (see below), whose sum is σ = 42364383600. Its totient is φ = 37803677184.

The previous prime is 40043213537. The next prime is 40043213557. The reversal of 40043213543 is 34531234004.

It is not a de Polignac number, because 40043213543 - 2⁴ = 40043213527 is a prime.

It is a super-2 number, since 2×40043213543² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043213513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30873071 + ... + 30874367.

It is an arithmetic number, because the mean of its divisors is an integer number (1765182650).

Almost surely, 2^40043213543 is an apocalyptic number.

40043213543 is a deficient number, since it is larger than the sum of its proper divisors (2321170057).

40043213543 is a wasteful number, since it uses less digits than its factorization.

40043213543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 40043213543 its reverse (34531234004), we get a palindrome (74574447547).

The spelling of 40043213543 in words is "forty billion, forty-three million, two hundred thirteen thousand, five hundred forty-three".